Patent US4364628A successfully refreshed from Google Patents.
US4364628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical sights
Assignee: BAE Systems Electronics Ltd
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Filing: 1980-09-05
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Granted: 1982-12-21
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Expires: 2000-09-05
Abstract
Abstract The invention provides a stabilizable optical gun sight including an optical system having an eye piece and an objective lens and between the eyepiece and objective lens, two optical wedges which are arranged to be driven differentially and together in order to deflect the line of sight through the optical system in response to servo control signals applied to the driving means.
Inventors
- 👤 Frederick Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:12
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/22; G; G02; G02B; G02B27/00; G02B27/64; G02B27/646
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
212 words
A stabilisable optical sight suitable for use with a fighting tank gun control system which has gun barrel stabilisation apparatus including means for developing stabilisation error signals resulting from movement of the tank, and means for utilising the thus developed stabilisation error signals to drive the tank's gun barrel in elevation and the tank's gun turret in azimuth to provide the required stabilisation, said sight comprising: an optical system with an eye piece, an objective lens, and a pair of serially-arranged optical wedges disposed between said eye piece and said objective lens on the optical axis of said optical system, said pair of optical wedges being mounted on first and second mounting means so as respectively to be rotatable about said optical axis both relatively one wedge with respect to the other and together, whereby the line of sight through said optical system may be moved by rotation of one or both of said wedges; driving means connected to said first and second mounting means for causing said optical wedges to be so rotated in operation; and means for applying servo control signals to said driving means, whereby in operation the wedges may be so rotated in order to stabilise the sight against movement of a body on which it is carried.
Claim 2
Dependent Claim
212 words
A stabilisable optical sight suitable for use with a fighting tank gun control system which has gun barrel stabilisation apparatus including means for developing stabilisation error signals resulting from movement of the tank, and means for utilising the thus developed stabilisation error signals to drive the tank's gun barrel in elevation and the tank's gun turret in azimuth to provide the required stabilisation, said sight comprising: an optical system with an eye piece, an objective lens, and a pair of serially-arranged optical wedges disposed between said eye piece and said objective lens on the optical axis of said optical system, said pair of optical wedges being mounted on first and second mounting means so as respectively to be rotatable about said optical axis both relatively one wedge with respect to the other and together, whereby the line of sight through said optical system may be moved by rotation of one or both of said wedges; driving means connected to said first and second mounting means for causing said optical wedges to be so rotated in operation; and means for applying servo control signals to said driving means, whereby in operation the wedges may be so rotated in order to stabilise the sight against movement of a body on which it is carried.
Claim 3
Dependent Claim
71 words
A sight as claimed in claim 1 wherein: said first mounting means includes first and second parts, which are arranged freely to be rotatable within a casing, on which said two wedges are mounted, respectively, each said part carrying a bevel gear with the two bevel gears arranged to be driven differentially by a bevel pinion; and said drive means includes a first servo motor assembly for driving said bevel pinion.
Claim 4
Dependent Claim
97 words
A sight as claimed in claim 2 wherein: said second mounting means includes a further part which is arranged freely to be rotatable within said casing and on which said first servo motor assembly is itself mounted; and said drive means further includes a further servo motor assembly mounted on said casing and connected to said further part for driving same, whereby operation of said further servo motor assembly causes said further part, said first servo motor assembly and said differential pinion gear to be rotated together thus causing said two optical wedges to be rotated together.
Claim 5
Dependent Claim
94 words
A sight as claimed in claim 3 wherein each said servo motor assembly comprises a servo motor, a gear box drive and a positional transducer, and for each servo motor assembly a servo amplifier control loop is provided comprising an input terminal for error control signals, a comparator connected to derive input from said input terminal and from the output of said positional transducer, and a servo amplifier connected to the output of said comparator via a signal processing circuit as required, the output of said amplifier being connected to drive said servo motor.
Claim 6
Dependent Claim
116 words
In a gun control system for a fighting tank including a gun barrel stabilisation apparatus comprising means for developing stabilisation error signals resulting from movement of said tank, and means for utilising the thus developed said stabilisation error signals to drive the tank's gun barrel in elevation and the tank's turret carrying said gun barrel in azimuth to provide the required stabilisation; the improvement wherein said gun control system incorporates a stabilisable optical gun sight as claimed in claim 1 arranged to receive servo control signals from said gun barrel stabilisation apparatus; with said servo control signals being applied to said driving means so as to provide compensation for any stabilisation error remaining in said system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |